The Enhanced Magnetic Model (EMM) extends to degree and order 720, resolving magnetic anomalies down to 56 km wavelength. The higher resolution of the EMM results in significantly improved pointing accuracy than the World Magnetic Model (WMM), which uses spherical harmonic representation to degree and order 12, resolving the magnetic field at 3000 km wavelength. The EMM model provides the magnetic field vector at any desired location and altitude close to and above the Earth’s surface.

Enhanced Magnetic Model (EMM2010) and software using the spherical harmonic approach for Windows and Linux environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement (7.5 MB). For use with years 2000 to 2015.

Enhanced Magnetic Model (EMM2010) with software with rapid field calculation using 3D mesh interpolation for Windows and Linux environments. Low CPU requirements, High (1.4 GB) RAM requirement. Only works for years 2010-2015, for 2000-2010 please download the spherical harmonic version above.

Software for the Enhanced Magnetic Model (EMM-06), including main field, secular variation, NGDC-720-V1 crustal field, magnetospheric field, and induced field. The package includes a simple single-point program and a thread-safe multi-processor application which can be adapted to produce large grids and time series.

EMM2010_Sph_Windows_Linux.zip

Format version:
4

Format specification:
Enhanced Magnetic Model (EMM2010) and software using the spherical harmonic approach for Windows and Linux environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement (7.5 MB). For use with years 2000 to 2015.

EMM2010_Mesh_Windows_Linux.zip

Format version:
3

Format specification:
Enhanced Magnetic Model (EMM2010) with software with rapid field calculation using 3D mesh interpolation for Windows and Linux environments. Low CPU requirements, High (1.4 GB) RAM requirement. Only works for years 2010-2015, for 2000-2010 please download the spherical harmonic version above.

EMM2010_Dec-15-09.zip

Format version:
1

Format specification:
Enhanced Magnetic Model (EMM2010) with software for point and grid calculation.

Format specification:
Software for the Enhanced Magnetic Model (EMM-06), including main field, secular variation, NGDC-720-V1 crustal field, magnetospheric field, and induced field. The package includes a simple single-point program and a thread-safe multi-processor application which can be adapted to produce large grids and time series.

Fees

None

Use Limitation

While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.